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2 Sheets-Sheet 1.

W. HICKOK.

Hot Air Furnace.

Patented May 15, 1847.

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v 2 Sheets-Sheet 2 'W. HICKOK.

Hot Air Furnace.

Patented May 15,1847.

UNITED STATES/PATENT OFFICE."

WM. HIcxoK, on NEW- YORK, N. Y.

AIR-HEATING FURNACE.

Specification of Letters Patent No. 5,118, dated May 15, 1847.

T 0 alll whom it may concern Be it known that I, WILLIAM 'Hxoxox, of the city and county and State of New York, have invented a new and useful Furnace for .Heating Buildings, which is described as follows, reference being had to the annexed drawings of the same, making part of this specification.

Figure 1 is a perspective view of the heater. Fig. 2 is a horizontal section on the line w a: of Fig. 1 through the upper sectional flues. Fig. 3 is a horizontal section on the line 00 of Fig. 1 through the lower sectional flues. Fig. 4 is a perspective view of the vaporizer. Fig. 5 is a vertical longitudinal section of ditto.

This heater is made in the form of a polygon having its sides A recessed outwardly in oblong panels A the recess or panels being filled with similarly shaped plates of plaster of Paris, soap stone, or other nonconducting material, that will prevent the radiation of the heat through said plates.

hexagonal plate A is cast with a flange or lip around its outer edge extending downward of sufficient depth to overlap the upper edges of the vertical plates of the hexagonal chamber.

The bottom hexagonal plate A has a similar flange or lip turned upward around its outer edge for receivingand confining the lower ends of the said vertical plates composing the sides of the hexagonal hot air chamber. The top plate A contains a large round opening in the center (directly over the circular chamber of combustion B hereafter described) through which the fuel may be introduced to the furnace-saidi opening being closed by a cover or lid B during the combustion of the fuel. Around this central opening are made four, or more, or less, small round, or square, openings, C, provided with collars to which are fitted pipesfor conveying heated air to the rooms of the upper stories of the building. The bot-tom'hexagonal plate A contains a round opening in the center for the grate D. Also several small openings E around the cen-- v the heater. Two or more of theselsides have openings as at F .to admit air to be heated. Or if more convenient the air may bereceived underneath and have said openings closed as represented at F 2 Fig. 1, by dotted lines the air ascending from the base F through the openings E among the pipes o.

The front plate of the base-contains an opening Gr to admit the .ash .pan which slides into a box G of a shape corresponding with that of the ash pa'n being made larger inside than the ash pan in order to slide freely therein. This casing or box G around the ash pan prevents the escape of the ashes into the room through the openings in the sides of the base. The cylinder or chamber of combustion B is made and arranged in the usual manner, extending from the bottom to the top plate of the heater, being of the same diameter as the central circular openings in said plates. It is provided with a door H and inclined feeding trough I of the usual form and arrangement.

The upper end of the chamber of combus tion is closed by a round lid B which is to be raised when it is desired to have access to the interior of the fuel chamber through the top for feeding in the fuel or for any other purpose. Immediately below thislid and near the smoke pipe an opening K is made in the cylinder for a flue L to lead tothe smoke pipe at pleasure, by a hinged valve N for the purpose of opening a direct communication from the fire chamber to the smoke pipe, or by closing it, for turning I the draft through a series of zig zag pipe-s or flues 0 0, &c., arranged around the fire chamber between it and the non-radiating polygonal case which extends from saidv opening first horizontally then vertically down to near the bottom of the casethen horizontallythen vertically upward to the topthen horizontally toward the front then down againthen horizontally then up, and so on until the whole annular space between the chamber and case be filled with said pipes or zig zag flues-the last upper horizontal section 0 opening into the enlargement or base of the smoke pipe C in which! the aforesaid valve is placed. The horizontal or sectional parts of the flues 0 Fig. 2 and at 0 Fig. 3 are made square in three. cross sections having semi-circular ends. The vertical parts ofthe flues are made cylindrical. The plates of plaster of i Paris 2) soap stoneor other non-conduct ing material, are confined in the aforesaid recesses in the vertical plates A composing the polygonal case by means of metallic or other lattice Work P, confined to the plates A. i

The lining of the door is confined in the usual manner.

The vaporizer Q for imparting moisture to the heated air is a rectangular box having a round or square opening in the top and bottom surrounded by circular or square collars gtl1at on the bottom fitting over one of the collars 0 on the top of the heater surrounding one of the air holes. And the collar on the top of the vaporizer being made to receive the end of a conducting pipe for conducting the hot air to the apart- I ment to be heated.

- A cylindrical or square curb R is formed around the opening in the bottom of the vaporizer on the inside thereof rising about two-thirds the height of the vaporizer. The

vaporizer is to be half filled with Water.

The heated air strikes upon the surface of "the Water and thus becomes moistened before passing through the pipe to the chamher to be heated. W represents the Water.

What I claim as my invention and desire to secure by Letters Patent is- The combination of the-vaporizer Q With the air heater A constructed and operated in the manner and for the purpose above set forth.

WM. HICKOK. Witnesses:

ELLWooD BURDSELL, CHAS H. STEWART. 

